I'm sorry you have such scary things going on right now. My first question is - what makes you wonder about MS? Have you already been to a doctor who suggested it as a possibility? Although MS can take many forms and we all have any number of twitches and twinges, there's not a single symptom that's exclusive to MS, and every single one of us presents in a different way. There are many, many conditions that mimic MS.
If you haven't already, the very first thing you should do is present your symptoms to your primary care doctor and let him/her guide you through the process of identifying what might be wrong. I've also found that they don't really appreciate when a patient shows up and suggests their own personal "internet diagnosis"
so I wouldn't direct their moves unless they seem to dismiss everything as your imagination.
My first neuro was actually furious that I already had an MS diagnosis from another (non-neuro) doc before I got there and was very abusive about it. My 2nd neuro also seemed irritated that I already had a dx and tried to disprove it.
Although there is also no single MS test, a doctor can get clues from a simple neuro check and use MRIs and other tests to narrow it down. Sometimes it takes a while, but In my case I was diagnosed immediately after a physiatrist noticed my abnormal reactions and sent me for an MRI. In fact, I always suggest a physiatrist (neuro/muscular/skeletal/pain/rehab type of doc) as the perfect one to diagnose MS-y type of problems.
My only complaint was a slight tremor in one finger, and within 2 weeks the physiatrist had me diagnosed with almost 100% positive MS, along with a peripheral neuropathy (HNPP) that causes many of the same twitches, tingles, and spasms as MS.
Good luck to you, and please talk to your doctor.